I for one don't get the anti-Semitic stuff. But then again I am not a religious person so I really don't care who or what your worship. I don't know if the GOP or Dems are any better or worse, but I do know that two very anti-Semitic people in Congress are Dems and the GOP is generally more friendly to Israel.
Not sure if you are referring to two Muslim members of Congress, who are not pro-Israel but who are also not anti-Semitic. They happen not to think Israeli treatment of Palestinians is acceptable, and they do not buy into the "yeah but whaddabout..." from those who unconditionally support Israelis no matter whether all Palestinians are being made to pay for the indefensible behavior of some. Same of course goes for anyone on the flip side blaming Palestinians for indiscriminate injury to Israelis. In either case, it's not about religion, it's about geopolitical concerns.
There's a lot of "flex" in both practice and belief that "the GOP is generally more friendly to Israel".
Some fundamentally inclined Christians believe it is necessary during the times in which we now live to protect existence of Jews in Israel, so that the Scriptures in which they believe will bear out true in their prophesy of "the Rapture."
However, some other Christians believe that Israel was created by divine providence and that it is a holy land in which Jews and Christians alike have sprung from the same tribe. Some of those believers in the USA are not necessarily Republicans.
Bottom line though, the Abrahamic religions (Islam, Judaism, Christianity) all do associate that part of the MIddle East as the homeland of the one God they call by different names. In at least urban areas of the USA, one can usually find clerics in all three of those religions who will agree that their prophets foretold of the one true God and that the lineage of those prophets does go back to Abraham.
Where it gets complicated --and often ends up with people hurling charges at each other about being biased-- is sorting out Israeli and Palestinian politics, and what exactly are the geopolitical entities variously thought of as Israel or Palestine or "Israel and Palestine" or "the West Bank and Gaza and part of Israel and sometimes Jordan." Jordan so far shrugs and builds more tents for refugees from Iraq or Syria... and probably recites the lamentations of Jeremiah from time to time in the darkness of night. Yes, Jeremiah was regarded as a prophet by Islam too.
These issues of "the holy land" today are largely secular issues, not religious ones, and yet there is a large contingent of both observant Jews, Christians and Muslims who continue to frame it all in terms of their own religious beliefs, i.e., efforts to conform interpretations of today's realities to both history and prophesy of ancient scriptures.
Yeah, so... that's not
too complicated for a country like the USA, lately well and truly mired in thinking everything can be sorted down to one or the other of a binary, of a pair of options, eh?
Still we insist on ability to know for sure who's being anti-Semitic and who's talking about secular politics. We also continue to burden ourselves with old-world tropes about characteristics of Jews, and post-9/11 tropes about characteristics of Muslims. The tropes about Christians --running the range from amused to outraged, e.g. from "angels and demons, gee" to ancestral memories of the Inquisition or burning at the stake in Tudor England-- are usually muttered under breath... since for all the complaining by some white evangelicals, Christianity is still the dominant religion in the USA. The adherents to other religions still have a corner of the soul that fears its place in a country with a First Amendment that guarantees freedom of worship but lately whines about "being replaced" when it has been and still remains dominant.
It's easy to blame any or all "religions" for this mess. More factually, we don't like admitting that the insisted upon differences are still largely down to racialized or nationalistic politics... yeah, tribes, and turf. What else is new under the sun since -- if one is scripturally inclined-- Adam and Eve met the snake and doubt was introduced to the Garden of Eden.